Riesel primes of the form 49•2n-1

Current data

k , b : 49 , 2 Count : 39 Nash : 1839 Max n : 5,000,000 Date : 2021-03-21

1, 5, 7, 9, 13, 15, 29, 33, 39, 55, 81, 95, 205, 279, 581, 807, 813, 2551, 2565, 3183, 6661, 11989, 16911, 22605, 30799, 39969, 41167, 43421, 54559, 212745, 290631, 332231, 460989, 542945, 691469, 1257295, 3309087, 4360869, 4365175

Remarks :

The sequence A050550 in OEIS

History

• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2018-03-01: Checked to n = 5000000, David Metcalfe, released
• 2018-01-32: Checked to n = 4870000, David Metcalfe
• 2017-11-02: Checked to n = 4610000, David Metcalfe
• 2017-09-18: Found n = 4365175, David Metcalfe
• 2017-09-18: Found n = 4360869, David Metcalfe
• 2016-05-01: Checked to n = 4300000, David Metcalfe
• 2014-09-15: Checked to n = 4000000, David Metcalfe
• 2014-05-31: Checked to n = 3700000, David Metcalfe
• 2014-05-01: Checked to n = 3590000, David Metcalfe
• 2014-04-04: Checked to n = 3500000, David Metcalfe
• 2014-02-28: Checked to n = 3440000, David Metcalfe
• 2013-09-30: Checked to n = 3410000, David Metcalfe
• 2013-08-30: Checked to n = 3370000, David Metcalfe
• 2013-08-01: Checked to n = 3330000, David Metcalfe
• 2013-07-17: Found n = 3309087, David Metcalfe
• 2013-06-30: Checked to n = 3270000, David Metcalfe
• 2013-05-30: Checked to n = 3200000, David Metcalfe
• 2013-04-13: Checked to n = 3000000, David Metcalfe
• 2013-03-30: Checked to n = 2900000, David Metcalfe
• 2013-01-31: Checked to n = 2860000, David Metcalfe
• 2012-12-31: Checked to n = 2800000, David Metcalfe
• 2012-11-30: Checked to n = 2750000, David Metcalfe
• 2012-11-02: Checked to n = 2700000, David Metcalfe
• 2012-08-31: Checked to n = 2550000, David Metcalfe
• 2012-08-02: Checked to n = 2470000, David Metcalfe
• 2012-06-30: Checked to n = 2380000, David Metcalfe
• 2012-05-31: Checked to n = 2300000, David Metcalfe
• 2012-03-31: Checked to n = 2250000, David Metcalfe
• 2012-02-29: Checked to n = 2230000, David Metcalfe
• 2012-01-31: Checked to n = 2210000, David Metcalfe
• 2011-12-31: Checked to n = 2170000, David Metcalfe
• 2011-12-01: Checked to n = 2150000, David Metcalfe
• 2011-10-31: Checked to n = 1940000, David Metcalfe
• 2011-10-04: Checked to n = 1900000, David Metcalfe
• 2011-09-12: Checked to n = 1860000, David Metcalfe
• 2011-06-07: Checked to n = 1700000, David Metcalfe
• 2011-03-05: Checked to n = 1550000, David Metcalfe
• 2010-12-06: Reserved by David Metcalfe from n=1400000
• 2008-10-31: Checked to n = 1400000, Mike Lehmann
• 2008-08-15: Checked to n = 1340000, Mike Lehmann
• 2008-06-29: Checked to n = 1300000, Mike Lehmann
• 2008-04-19: Found n = 1257295, Mike Lehmann
• 2008-04-07: Checked to n = 1240000, Mike Lehmann
• 2008-02-12: Checked to n = 1200000, Mike Lehmann
• 2008-01-15: Checked to n = 1160000, Mike Lehmann
• 2007-12-06: Checked to n = 1120000, Mike Lehmann
• 2007-11-14: Checked to n = 1090000, Mike Lehmann
• 2007-10-23: Checked to n = 1050000, Mike Lehmann
• 2007-09-09: Checked to n = 1000000, Mike Lehmann
• 2007-08-16: Checked to n = 950000, Mike Lehmann
• 2007-04-11: Found n = 691469, Mike Lehmann
• 2007-02-25: Found n = 542945, Mike Lehmann
• 2007-02-14: Found n = 460989, Mike Lehmann
• 2004-05-11: Found n = 332231, Mark Rodenkirch
• 2004-05-11: Found n = 290631, Mark Rodenkirch
• 2004-05-11: Found n = 212745, Mark Rodenkirch
• 1998-08-19: Found n = 30799, Wilfrid Keller
• 1998-08-16: Found n = 22605, Wilfrid Keller